Updated: Dec 15, 2025
Location
Address
P O BOX 906, Tiburon, CA, 94920
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Usonia Construction
Usonia Inc at P O BOX 906, Tiburon, CA 94920, held a General Contractor license (#338924) with the California contractors license board with an expiration date of 08-31-1991. We last verified the license was expired on 12-14-2025.
Their BuildZoom score is 0 because we haven’t been able to verify an active license. As a result, they’re not ranked in the top 50% of 336,931 California contractors.
If you’re thinking about hiring them, we recommend double-checking their license status with your local licensing authority. Alternatively, use our project planner to be easily matched to qualified, licensed professionals in your area.
Usonia Inc Services
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Usonia Inc Contact Information
Address: P O BOX 906, Tiburon, CA 94920
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Usonia Inc License info
Inactive License
| License # | 338924 |
| Status | Inactive |
| State | California |
| Type | General Building |
| Business Type | Corporation |
- According to the California Contractors State License Board, the status of this license was at one point cancelled. However, this information may have changed. If this is your business, please update your license status.
Check this license's status for Usonia Inc at the California Contractors State License Board.
This is a sample of licensing data; click here to access a complete history.
ALERT*
BuildZoom Score
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- *No active license on file. If you are Usonia Inc, click “This is My Business” to update your information.
Bonded
| Bonded Agent | This License Filed A Contractor's Bond With |
| Bond Value | $5,000 |
Usonia Inc Employees
ED
Elly Louise Drosihn
Officer
JD
Joseph Frank Drosihn
Rmo / Ceo / Pres